391262742 has 24 divisors (see below), whose sum is σ = 912946944. Its totient is φ = 120388464.

The previous prime is 391262741. The next prime is 391262761. The reversal of 391262742 is 247262193.

391262742 is a `hidden beast` number, since 391 + 262 + 7 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 391262697 and 391262706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391262741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 835798 + ... + 836265.

It is an arithmetic number, because the mean of its divisors is an integer number (38039456).

Almost surely, 2^391262742 is an apocalyptic number.

391262742 is an abundant number, since it is smaller than the sum of its proper divisors (521684202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

391262742 is a wasteful number, since it uses less digits than its factorization.

391262742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672084 (or 1672081 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 391262742 is about 19780.3625345948. The cubic root of 391262742 is about 731.4020356243.

The spelling of 391262742 in words is "three hundred ninety-one million, two hundred sixty-two thousand, seven hundred forty-two".